{"id":"994ad160-1909-49c3-a99c-c8b0889c7136","arxiv_id":"1208.3654","paper_version":2,"verdict":"CONDITIONAL","confidence":"HIGH","novelty_score":5.0,"correctness_risk":"low","formal_verification":"none","parameter_count":5,"one_line_summary":"In the low-scale type I see-saw model the Higgs can decay to a light plus a heavy neutrino with a branching ratio up to roughly 20 percent, potentially observable at the LHC.","lead":"In the TeV-scale type I see-saw model the Higgs boson can decay into one light and one heavy neutrino with a branching ratio up to about 20 percent, and the authors estimate the LHC could observe this with 10 inverse femtobarns at 14 TeV. The result ties Higgs measurements to the origin of neutrino mass and to the MEG mu-to-e-gamma search.","discovery_kind":"new_application","skeptic_critique":{"model":"selfhosted/deepseek-v4.1-flash","headline":"The LHC reach in Fig. 8 uses S/√(S+B) with a background 25× the signal; with realistic background systematics the 3σ/5σ contours move above the MEG bound, weakening the claimed LHC–MEG complementarity.","rationale":"The paper's core physics is sound: the decay rate in section 3 follows from the Lagrangian of eq. (2) and is internally consistent with the quoted ratio Γ(h→νN)/Γ(h→bb) ≈ 0.19 (y/0.05)², and the BR up to ~20% is an honest existence claim conditional on saturating the MEG-derived bound on y. The reader's CONDITIONAL verdict is appropriate. My concern sharpens the systematics issue the reader flagged in the rationale but did not elevate to the weakest assumption: because the background is 25× the signal, the S/√(S+B) significance is quantitatively fragile, and even a 5% background uncertainty collapses the 10.6σ point at y = 0.04 to sub-1σ. This does not break the paper's central existence claim about the branching ratio, but it does bound how seriously the reach curves in Fig. 8 and the LHC–MEG complementarity should be taken. The reader's weakest_assumption (saturating y) is a caveat about the nature of an existence claim rather than a methodological flaw; the systematics issue is the more load-bearing concern for the paper's second main claim. I would keep the verdict at CONDITIONAL and recommend the authors add a background-systematics band to Fig. 8 or state explicitly that the reach curves assume an exactly known background.","tokens_in":23393,"tokens_out":21077,"duration_ms":416754,"concrete_test":"Recompute the 3σ and 5σ contours of Fig. 8 using S/√(S+B+(σ_B B)²) with σ_B = 0.05 and 0.10, using the cross sections in Table 1. If the contours move above y ≈ 0.042 (NH) / 0.056 (IH) at M1 = 100 GeV, the complementarity claim does not survive.","verdict_should_be":"UNCHANGED","load_bearing_attack":"The paper's 'conservative' significance S = Ns/√(Ns+Nb) (eq. 23) treats the background as exactly known. At M1 = 100 GeV, IH, 14 TeV, 10 fb⁻¹, Table 1 gives Ns = 2930 and Nb = 74000 at y = 0.04. A 5% background uncertainty alone adds (0.05 × 74000)² = 1.37e7 to the denominator, reducing the significance from 10.6σ to 0.8σ. Even at the MEG bound y ≈ 0.056, the significance remains below 1σ. The reach curves in Fig. 8 (y ≳ 0.02 at 3σ) therefore depend on treating the background as exactly known. Since the paper's central complementarity claim is that the LHC can probe y values below the MEG bound, this systematic sensitivity is load-bearing: with realistic systematics, the LHC reach may not extend below the MEG bound at all. The paper does not discuss background systematics, data-driven background estimation, or control regions, so the reach curves should not be read as robust projections.","agreement_with_reader":"partial"},"referee_report":{"model":"selfhosted/deepseek-v4.1-flash","summary":"The manuscript studies the exotic Higgs decay h → ν_L N in the low-scale type I see-saw model with two heavy Majorana neutrinos forming a pseudo-Dirac pair N_PD, for the case M1 < mh. Working at leading order, the authors derive Γ(h → νN) = (1/16π) y² mh (1 − M1²/mh²)², show that for mh = 125 GeV and M1 = 100 GeV the ratio to h → bb is ≈ 0.19 (y/0.05)², and argue that all existing constraints (neutrino oscillation data, μ → eγ, μ–e conversion, LEP2 heavy-neutrino searches, electroweak precision) still permit BR(h → νN) as large as roughly 20%. They then simulate the chain h → νN → νℓjj at 8 and 14 TeV, specify acceptance, MET and mass cuts, tabulate signal and background cross sections in Table 1, and present 3σ/5σ reach curves in the (M1, y) plane (Fig. 8), arguing for complementarity with the MEG μ → eγ search.","tokens_in":23698,"tokens_out":10907,"duration_ms":209682,"significance":"If the result holds, it is a useful and timely observation: the paper identifies a Higgs decay channel that is a direct probe of the neutrino Yukawa coupling in a TeV-scale see-saw, and it makes the complementarity with MEG explicit and falsifiable. The leading-order width formula is clean and internally consistent with the SM h → ff̄ formula of Eq. (12), and the numerical ratio 0.19 (y/0.05)² checks out. The collider analysis is presented with enough detail (cuts in Eqs. (19), (21), (22); smearing in Eq. (20); signal and background cross sections in Table 1) to be reproduced, which is a genuine strength. The main caveat is that the headline 20% figure is explicitly conditional on saturating the MEG-derived bound on y, and the LHC reach inherits that conditionality.","major_comments":[{"comment":"The statistical significance is computed as S = Ns/√(Ns + Nb) and is described as 'conservative', but this formula treats the background as exactly known, which is not conservative when Nb/Ns is large. At M1 = 100 GeV, IH, 14 TeV, 10 fb⁻¹, Table 1 gives Ns ≈ 2930 and Nb ≈ 74000, so a 5% background uncertainty alone adds (0.05 × 74000)² ≈ 1.4 × 10⁷ to the denominator and reduces the significance from ≈ 10.6σ to below 1σ; even a 1% uncertainty leaves ≈ 3.7σ. Since the central complementarity claim is that the LHC can probe y values below the MEG bound, this systematic sensitivity is load-bearing for the reach curves in Fig. 8. The authors should either quote the reach with an explicit background-uncertainty assumption (including a data-driven sideband or shape-analysis treatment) or state the caveat prominently and soften the complementarity claim accordingly; the word 'conservative' should be removed or justified.","section":"§4, Eq. (23) and Fig. 8","authors_acknowledge":null,"authors_acknowledge_p":null},{"comment":"The signal cross sections are non-monotonic in M1 in a way that is not explained by the stated formulae. For NH at 8 TeV the entries are 0.061, 0.132 and 0.051 pb at M1 = 90, 100 and 110 GeV, so the 100 GeV point is about twice the 90 GeV point. However, the phase-space factor (1 − M1²/mh²)² decreases monotonically over this range (0.232, 0.130, 0.051), and the N → Wℓ branching ratio also decreases with M1 once the Z channel opens (µZ < 1 for M1 > mZ), so the product should decrease monotonically. Please explain the origin of the 90 → 100 GeV rise (e.g., acceptance, generator settings, or an error in the table), since Fig. 8's reach depends directly on these numbers.","section":"Table 1","authors_acknowledge":null,"authors_acknowledge_p":null},{"comment":"The background is quoted as a single number (3.45 pb at 8 TeV and 7.40 pb at 14 TeV after all cuts) with no breakdown by process, generator settings, or treatment of matching, ISR/FSR and detector simulation. This matters because the mT window 110–130 GeV in Eq. (22) lies above the W Jacobian peak at mW, where the dominant W+jets background should be strongly suppressed; a residual background of 7.4 pb after the full cut flow is large and needs justification. A process-by-process table, together with a statement of how the background was validated, would make the reach estimate credible.","section":"§4, Table 1","authors_acknowledge":null,"authors_acknowledge_p":null}],"minor_comments":[{"comment":"The notation conflates the branching ratio BR(h → νN) with the relative reduction of a SM channel: the chain 'BR(h → νN) ≡ Γ(h → νN)/(Γ(h → νN) + ΓSMtot) = 1 − BR(obs)/BR(SM)' is numerically correct but reads as if the branching ratio equals the reduction. It would be clearer to define the branching ratio and the relative reduction as separate quantities and then state the relation between them.","section":"§3, Eq. (13)","authors_acknowledge":null,"authors_acknowledge_p":null},{"comment":"The overall normalization 1/16π corresponds to a specific convention for the hνN coupling relative to Eq. (2); the reader cannot immediately check the factor against the Lagrangian. Please state the convention explicitly, or show the one-line derivation from Eq. (2) and Eq. (9).","section":"§3, the Γ(h → νN) expression","authors_acknowledge":null,"authors_acknowledge_p":null},{"comment":"The figure shows a BR(h → νN) = 0.4 contour, while the text quotes 20% as the maximum allowed value. Please state whether any part of the 0.4 contour lies outside the excluded region, and if so reconcile it with the text; if not, the 0.4 contour could be omitted or labelled as excluded everywhere.","section":"Fig. 1","authors_acknowledge":null,"authors_acknowledge_p":null},{"comment":"The mT window 110–130 GeV is optimized for mh = 125 GeV, and the signal phase space vanishes as M1 → mh. It would help to state the efficiency loss for M1 near 120 GeV and to confirm that the quoted reach curves include this effect.","section":"§4, Eqs. (19)–(22)","authors_acknowledge":null,"authors_acknowledge_p":null},{"comment":"The statement that the mass splitting z is 'too small to have observable effects at LHC' should be quantified, for example by giving the minimum z that would produce a resolvable mass splitting or displaced vertex in this channel.","section":"§5","authors_acknowledge":null,"authors_acknowledge_p":null},{"comment":"The MEG exclusion band and the LHC reach curves appear to use different assumptions (best-fit oscillation parameters versus a scan over Dirac and Majorana phases). Please state this explicitly in the caption so that the comparison is unambiguous.","section":"Fig. 8","authors_acknowledge":null,"authors_acknowledge_p":null}],"recommendation":"major_revision","confidential_remarks":"The leading-order width and the 20% branching-ratio claim are sound and the paper is a useful contribution. The weak point is the LHC reach: the significance formula ignores background systematics in a regime where the background is about 25 times the signal, and Table 1 has an unexplained non-monotonicity in M1. These are fixable with a caveat, a systematic-uncertainty estimate, and a clarification of the table, and I would be glad to see a revised version. The paper also leans heavily on the authors' own Refs. [5, 7, 8] for the parameter-space constraints; those are published, so this is not a correctness issue, but a brief statement of what is imported versus derived here would improve readability."},"author_rebuttal":null,"desk_editor":{"model":"selfhosted/deepseek-v4.1-flash","letter":"Two things worth knowing. The physics is right: the width Γ(h → ν_L N_PD) = (1/16π) y² m_h (1 − M₁²/m_h²)² follows cleanly from the Lagrangian in eq. (2), and the observation that this channel can reach BR ~ 20% while all constraints hold is genuinely new and worth having in the literature. The LHC reach in Fig. 8, though, is weaker than it looks, and the paper's word 'conservatively' for eq. (23) is backwards. On the good side: the derivation is clean, the constraint set is honestly assembled, and the bridge to MEG is a useful phenomenological connection. The paper is clear about the conditionality — the 20% figure requires saturating the MEG-derived bound on y, and the text says so even if the abstract is flatter. The collider analysis specifies cuts, smearing, and cross sections well enough to check. The soft spot is the significance calculation. At M₁ = 100 GeV, IH, 14 TeV, 10 fb⁻¹, Table 1 gives N_s = 2930 and N_b = 74000 at y = 0.04. S/√(S+B) = 10.6, but that treats the background as exactly known. A 5% background uncertainty alone adds (0.05 × 74000)² = 1.37e7 to the denominator and drops the significance to 0.8σ. At the MEG bound y ≈ 0.056 it is about 1.5σ, not below 1 as the stress test says, but still well below 3. The reach curves in Fig. 8 are systematics-limited, not statistics-limited, and the claimed complementarity — LHC probing y below the MEG bound — does not survive a realistic background treatment. The paper needs a systematics term, a control-region strategy, or a softer reach claim. This is fixable, but it should be fixed before the 3σ/5σ curves are quoted. The hand-picked relative branching benchmarks (0.55, 0.94) are less of a problem than they look: Fig. 3 shows the scan over phases that justifies them, so that's a minor point. Who should read it: anyone working on exotic Higgs decays or low-scale seesaw phenomenology. The width formula and the BR estimate are useful; the reach curves should be read with the systematics caveat in mind. Recommendation: send it to referees. The core result is sound and the systematics issue is addressable in revision.","headline":"The h → νN branching-ratio result is sound and new; the LHC reach curves are systematics-limited and should not be taken at face value.","tokens_in":24405,"tokens_out":5067,"would_cite":true,"duration_ms":96267,"reading_group":"maybe","serious_thinker":"yes","would_accept_peer_review":true},"pith_extraction":{"msc":[],"pacs":["14.60.Pq","12.60.-i","14.80.Bn","13.35.Hb"],"model":"selfhosted/deepseek-v4.1-flash","headline":"The paper argues that in the low-scale type I see-saw model, the Higgs boson can decay into a light neutrino plus a heavy pseudo-Dirac neutrino with a branching ratio as large as about 20%, without violating any existing constraint fromneut","keywords":["type I see-saw","heavy Majorana neutrino","pseudo-Dirac fermion","exotic Higgs decay","lepton flavour violation","neutrino Yukawa coupling","LHC search","electroweak-scale neutrino mass"],"falsifier":"An improved MEG limit on $BR(μ$ to $e γ)$ below about $10^{-13}$, which would push the allowed $y$ under roughly 0.02 and close the LHC-observable window, or a dedicated LHC search in the one-lepton-two-jet-plus-missing-energy channel finding no excess at 10 inverse femtobarns in the $90$ to $110$ GeV mass range.","tokens_in":49420,"feed_emoji":"⚛","tokens_out":6095,"duration_ms":113134,"temperature":0.7,"pith_summary":"The paper asks whether the Higgs boson discovered at the LHC can decay into a light neutrino and a heavy neutrino, and whether that decay could be seen. In the low-scale type I see-saw model with two heavy Majorana neutrinos near the electroweak scale, the two heavy states pair up into a pseudo-Dirac fermion $N_{PD}$, and the same Yukawa coupling $y$ that generates the light neutrino masses also controls the Higgs coupling to $N_{PD}$. The authors show that the rate is $y^2$-suppressed but not hopelessly so: at $m_h = 125$ GeV and $M_1 = 100$ GeV the ratio to $h$ to $b$ anti-$b$ is roughly $0.19 (y/0.05)^2$, so a branching ratio near 20% survives every current bound. They then simulate the chain $h$ to $ν N_{PD}$, $N_{PD}$ to $W$ plus charged lepton, $W$ to two jets, and estimate the LHC reach. The point of interest is that a collider measurement of this exotic Higgs channel and the MEG search for $μ$ to $e γ$ probe the same coupling from opposite directions, so one can confirm or exclude the other.","feed_headline":"A 125 GeV Higgs could decay into a heavy neutrino 20% of the time","feed_subtitle":"Seesaw couplings still allowed by mu-to-e-gamma limits leave room for a decay the LHC could see.","key_machinery":"The load-bearing object is the pseudo-Dirac heavy neutrino $N_{PD} = (N_1 ± i N_2)/√2$, formed because the neutrino mass constraint $|Σ_k (RV)^*_{ℓ' k} M_k (RV)^†_{k ℓ}| ≲ 1$ eV forces $M_2 = M_1(1+z)$ with $z ≪ 1$ when the heavy masses sit below the Higgs mass. This near-degeneracy is what allows a large Yukawa coupling $y$ while keeping the light neutrino masses small, and it is the same coupling that appears in the Higgs vertex, in the $W$ and $Z$ couplings of $N$, and in the one-loop amplitude for $μ$ to $e γ$. The flavour structure of $(RV)_{ℓ k}$ is fixed by the oscillation data through explicit formulas for normal and inverted hierarchy, which is what makes the $e$-plus-$μ$ fraction of $N$ decays predictable: about 0.94 for inverted hierarchy and 0.20 to 0.80 for normal hierarchy.","core_discovery":"The central claim is that the severe constraints on the low-scale type I see-saw model, namely reproducing the measured neutrino masses and mixings, the null results on $μ$ to $e γ$, $μ$ to $3e$ and $μ$ to $e$ conversion, LEP2 searches for heavy singlet neutrinos, and electroweak precision data, still leave an open window in which the Higgs decays into a light and a heavy neutrino with a sizable branching ratio. The heavy states $N_1$ and $N_2$ must be nearly degenerate to satisfy the neutrino mass constraint, so they form a pseudo-Dirac pair, and the decay $h$ to $ν_{ℓL} N_{PD}$ has rate $Γ = (1/16π) y^2 m_h (1 - M_1^2/m_h^2)^2$. Saturating the MEG-derived limits $y ≲ 0.042$ (normal hierarchy) and $y ≲ 0.056$ (inverted hierarchy) at $M_1 = 100$ GeV gives a branching ratio up to roughly 20%, and correspondingly suppresses the Standard Model Higgs branching ratios by as much as 25%. The paper then shows that with 10 inverse femtobarns at 14 TeV, values of $y$ as small as about 0.02 with $90$ GeV $≲ M_1 ≲ 110$ GeV would give a 3 to 5 $\\sigma$ signal in the one-lepton-plus-two-jets-plus-missing-energy channel.","pith_inferences":["The whole observable window is a boundary phenomenon: the predicted rate is largest exactly where the model is about to be excluded, so a null result at both MEG and the LHC would not so much rule out the scenario as squeeze it into a corner where the heavy neutrinos decouple from everything.","Because the same $y$ sets the Higgs vertex and the $μ$ to $e γ$ loop, a joint MEG-plus-LHC null result can be read as a measurement of $y$ from above rather than merely a bound, which is a stronger statement than either experiment makes alone.","The analysis assumes the pseudo-Dirac degeneracy $z ≪ 1$; if the two heavy states were split by an amount comparable to the Higgs width, the Higgs could resolve them and the interference between the $N_1$ and $N_2$ contributions to $h$ to $ν N$ would change the rate in a way the present treatment does not track.","The same one-lepton-two-jet-plus-missing-energy signature is shared by other electroweak-scale neutrino-mass models, so the quoted reach is best read as a template for a broader class of searches rather than a test of type I see-saw alone."],"forward_implications":["A Higgs decaying through $h$ to $ν N_{PD}$ suppresses every Standard Model Higgs branching ratio by up to about 25%, a deviation large enough to matter for precision Higgs coupling fits.","With 10 inverse femtobarns at 14 TeV, the LHC can probe $y ≳ 0.02$ for $90$ GeV $≲ M_1 ≲ 110$ GeV at 3 to 5 sigma, which is the same range MEG probes through $μ$ to $e γ$.","If MEG reaches $BR(μ$ to $e γ) ∼ 10^{-13}$ without a signal, the resulting bound excludes $BR(h$ to $ν N) ≳ 1%$ for $M_1 ≳ 100$ GeV, closing the collider window.","Conversely, a positive MEG signal at that level would imply Standard Model Higgs branching ratio deviations larger than 2%, up to 25%, for $70$ GeV $≲ M_1 ≲ 100$ GeV.","For $M_1 > m_h$ the exotic channels $h$ to $ν N$ to $ν ν Z$ or $ν ℓ W$ are too suppressed by $y^4$ and three-body phase space to be observable."],"supporting_citations":[{"why":"Supplies the parameterisation of $(RV)_{ℓ k}$ in terms of oscillation data and the MEG-derived upper limits on $y$ that the whole branching-ratio estimate rests on.","marker":"[5]"},{"why":"The MEG measurement giving $BR(μ$ to $e γ) ≤ 2.4 × 10^{-12}$, the bound that sets the ceiling on $y$.","marker":"[9]"},{"why":"Earlier analysis of the same two-heavy-neutrino scenario that fixes the framework and the LFV constraints.","marker":"[7]"},{"why":"Updates the LFV and electroweak-precision constraints, including the CP-phase suppression of $μ$-$e$ transitions in inverted hierarchy.","marker":"[8]"},{"why":"Best-fit values of the neutrino oscillation parameters used to compute the flavour branching fractions of $N$.","marker":"[24]"},{"why":"DELPHI search for heavy singlet neutrinos in $Z$ decays, one of the exclusion regions shown in the parameter-space plots.","marker":"[26]"},{"why":"Provides the branching ratios of the heavy neutrino into $W ℓ$ and $Z ν$ as a function of $M_1$, needed to convert the Higgs rate into an observable final state.","marker":"[29]"},{"why":"Madgraph, the simulation tool used for the signal and background cross sections behind the LHC reach estimate.","marker":"[28]"}],"fun_headline_variants":["Seesaw limits still allow a 20% Higgs decay to a heavy neutrino","LHC could see the Higgs decay into a light and a heavy neutrino","Heavy neutrino Higgs decays survive mu-to-e-gamma constraints","Low-scale seesaw leaves an open Higgs decay window at 20%","Higgs to heavy neutrino decays can reach 20% in seesaw models"],"cache_read_input_tokens":0,"weakest_assumption_plain":"The sizable branching ratio requires the neutrino Yukawa coupling to sit at its current upper limit, a limit derived from the MEG bound on $μ$ to $e γ$ rather than measured, so any real coupling well below that ceiling shrinks the predicted rate quadratically.","fun_headline_variants_meta":{"raw":{"variants":["Seesaw limits still allow a 20% Higgs decay to a heavy neutrino","LHC could see the Higgs decay into a light and a heavy neutrino","Heavy neutrino Higgs decays survive mu-to-e-gamma constraints","Low-scale seesaw leaves an open Higgs decay window at 20%","Higgs to heavy neutrino decays can reach 20% in seesaw models"]},"model":"selfhosted/deepseek-v4.1-flash","effort":"low","attempts":1,"cost_usd":0.0,"raw_usage":{"total_tokens":2006,"prompt_tokens":965,"completion_tokens":1041,"prompt_tokens_details":null,"completion_tokens_details":{"reasoning_tokens":957}},"tokens_in":965,"tokens_out":1041,"duration_ms":18440,"image_pages":[],"temperature":1.0,"reasoning_budget":50,"reasoning_tokens":957,"transport_provider":"selfhosted","cache_read_input_tokens":0,"cache_creation_input_tokens":0},"cache_creation_input_tokens":0},"created_at":"2026-11-10T13:49:27.187088+00:00","model_set":{"reader":"selfhosted/deepseek-v4.1-flash"},"falsifier":"An improved MEG limit on $BR(μ$ to $e γ)$ below about $10^{-13}$, which would push the allowed $y$ under roughly 0.02 and close the LHC-observable window, or a dedicated LHC search in the one-lepton-two-jet-plus-missing-energy channel finding no excess at 10 inverse femtobarns in the $90$ to $110$ GeV mass range.","supporting_citations":[{"cited_title":"Low Energy Signatures of the TeV Scale See-Saw Mechanism","cited_arxiv_id":"1103.6217","evidence_quote":"Supplies the parameterisation of $(RV)_{ℓ k}$ in terms of oscillation data and the MEG-derived upper limits on $y$ that the whole branching-ratio estimate rests on."},{"cited_title":"New limit on the lepton-flavour violating decay mu -> e gamma","cited_arxiv_id":"1107.5547","evidence_quote":"The MEG measurement giving $BR(μ$ to $e γ) ≤ 2.4 × 10^{-12}$, the bound that sets the ceiling on $y$."},{"cited_title":"TeV Scale See-Saw Mechanisms of Neutrino Mass Generation, the Majorana Nature of the Heavy Singlet Neutrinos and $\\betabeta$-Decay","cited_arxiv_id":"1007.2378","evidence_quote":"Earlier analysis of the same two-heavy-neutrino scenario that fixes the framework and the LFV constraints."},{"cited_title":"The mu - e Conversion in Nuclei, mu --> e gamma, mu --> 3e Decays and TeV Scale See-Saw Scenarios of Neutrino Mass Generation","cited_arxiv_id":"1205.4671","evidence_quote":"Updates the LFV and electroweak-precision constraints, including the CP-phase suppression of $μ$-$e$ transitions in inverted hierarchy."},{"cited_title":"Global status of neutrino oscillation parameters after Neutrino-2012","cited_arxiv_id":"1205.4018","evidence_quote":"Best-fit values of the neutrino oscillation parameters used to compute the flavour branching fractions of $N$."},{"cited_title":null,"cited_arxiv_id":null,"evidence_quote":"DELPHI search for heavy singlet neutrinos in $Z$ decays, one of the exclusion regions shown in the parameter-space plots."},{"cited_title":"The search for heavy Majorana neutrinos","cited_arxiv_id":"0901.3589","evidence_quote":"Provides the branching ratios of the heavy neutrino into $W ℓ$ and $Z ν$ as a function of $M_1$, needed to convert the Higgs rate into an observable final state."},{"cited_title":"MadGraph 5 : Going Beyond","cited_arxiv_id":"1106.0522","evidence_quote":"Madgraph, the simulation tool used for the signal and background cross sections behind the LHC reach estimate."}],"review_version":1}